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‘That’s shady’: Rob Kardashian argues with Blac Chyna after she changes passcode to stop him from snooping through her phone

Their reality series hasn’t premiered yet, but fans have already seen quite a few blowouts between the couple.

And on Thursday Us Weekly released another dramatic clip from Rob & Chyna, which has Blac Chyna, 28, getting defensive as Rob Kardashian, 29, tries to go through her phone.

The two questioned each others’ loyalty as Chyna went on the defensive, while Rob couldn’t understand why she had to have her phone locked in the first place.

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‘Who’s this hitting your phone over and over?’ Rob Kardashian and fiancée Blac Chyna got into it after he realized she had changed the lock on her phone in new clip from Rob & Chyna

The video begins with Rob looking at Chyna’s phone, as it repeatedly rings, sounding like the star was receiving a number of text messages.

‘Yo, who’s this hitting your phone over and over?’ the former Keeping Up with the Kardashians star questions.

Chyna’s response was innocent enough at first, shrugging off the question as she asked him to simply check what name the phone said was texting.

Snooping: The star had become upset after Chyna received a bunch of messages in a row from someone

On the defensive: Chyna was upset that Rob was even snooping through her phone in the first place

However, she then begins to get upset as she asks why he’s even on her phone, later telling him it’s ‘like you don’t trust me… that’s really whack.’

She also explained that she had changed her phone’s password because she knew he had been going through it before.

Rob said that her upping the security was ‘shady,’ adding: ‘I just don’t get why you even care if I go through your phone.’

Chyna defended her phone lock, saying: ‘I might be talking to my mom or something about some s**t I don’t want you to be…’
No trust: The expectant mother was upset with Rob’s actions, saying it’s ‘like you don’t trust me… that’s really whack’

No trust: The expectant mother was upset with Rob’s actions, saying it’s ‘like you don’t trust me… that’s really whack’
Shady: Rob didn’t feel like he was doing anything wrong, sharing: ‘I just don’t get why you even care if I go through your phone’

Shady: Rob didn’t feel like he was doing anything wrong, sharing: ‘I just don’t get why you even care if I go through your phone’
Rob quipped that he was not about to read conversations between Chyna and her mother, but the star was upset at what Rob thought she could be doing.

‘I’m four months pregnant. I have two businesses that I’m running. I’m with [three-year-old son] King, and I literally don’t leave the house. So what could I possibly be doing?’
Her turn: An earlier preview for the show saw Chyna flipping out at Rob about who he had been texting

Her turn: An earlier preview for the show saw Chyna flipping out at Rob about who he had been texting
Furious: In the teaser, Chyna could be seen riding in the car with a friend as she chatted to Rob on the phone, with the discussion getting more heated by the second

Furious: In the teaser, Chyna could be seen riding in the car with a friend as she chatted to Rob on the phone, with the discussion getting more heated by the second

In the first teaser of the reality spinoff – which will debut on September 11 – the tables were turned as the expectant mother was furious at Rob for texting other women.

‘What are you still texting other females about?’ she questioned, as she sat beside a friend in the car.

The argument boiled over, and another clip saw Chyna screaming into the phone: ‘I’m not f***ing playing with you. Why the f*** are you still texting b***hes?’
Getting heated: Chyna could be seen screaming into her phone: ‘I’m not f***ing playing with you. Why the f*** are you still texting b***hes?’

Getting heated: Chyna could be seen screaming into her phone: ‘I’m not f***ing playing with you. Why the f*** are you still texting b***hes?’
Working it out: Rob had even admitted to his sisters on KUWTK that he was ‘over it’ after another blowout fight, but by the end of the episode he and Chyna had a ‘good talk’ and made up

Working it out: Rob had even admitted to his sisters on KUWTK that he was ‘over it’ after another blowout fight, but by the end of the episode he and Chyna had a ‘good talk’ and made up

A recent episode of Keeping Up with the Kardashians saw Rob admitting to his sisters that he had moved out of Chyna’s place, and believed the relationship to be over.

However, by the end of the episode, Rob was back with Chyna after ‘a good talk,’ but admitted: ‘I mean, it’s been tough. It’s really just…it takes either one person to man up, obviously that’s gonna have to be me. But at the same time I’m not gonna argue with a female.’